West Delta Deep Marine – The Power to Expand
Publish Date: 15th October 2014
Author: Dave Smith (UK)
Conference: DOT 2014
In 1999 INTECSEA (Previously INTEC) commenced a FEED study for the West Delta Deep Marine (WDDM) concession, offshore Egypt in the Mediterranean. The development was to be operated by the Burullus Gas Company, a Joint Venture comprising BG, Edison Gas and EGPC (Egyptian General Petroleum Company). Since that time Edison Gas have sold their share to Petronas Carigali. This was the first deepwater development offshore Egypt, an area with no experience in deepwater developments (beyond diver depths) and with little associated infrastructure. The development was also pioneering in that it was to be, at that time, one of the longest tie-backs to shore at 90 km initially with the Scarab /Saffron fields, 8 wells and 2 manifolds. Since those early days, INTECSEA have continued working alongside Burullus Gas, delivering a number of phases of the development, with the expansion being further, 105 km, from shore and deeper, 1024 m. This article describes the manner in which services, such as subsea electrical power, have been managed to allow expansion beyond the original planned capacity of 3 hubs, each with a maximum of 12 wells and 3 manifolds to in excess of 50 wells and 12 manifolds today with further expansion and third party tie-in planned, adding potentially another 20 wells and associated manifolds.
Flexibility is a key value that subsea solutions can bring to deepwater developments. The expandability of subsea architecture can allow for reservoir characterization while production is underway, thus enabling capital expenditures to be paced in accordance with expected field performance. As deepwater basins continue to proliferate, this experience is expected to pay off in increasingly flexible designs with corresponding benefits to operators.
This article describes our work associated in providing the operator with the ability to provide power to the subsea system and the manner in which expansion has been managed from the early days to the present.